Focusing-camera.



No. 657,437 Pa tentd Sept. 4, 1900. J. n. MORLEY.

FOCUSING CAMERA.

(Application filed May 16, 1 900.)

(No Model.)

Oil WN No. 657,437. Patented Sept. 4, I900.

- J. D. MORLEY.

FOCUSING CAMERA.

(Application filed May 16, 1900.|

2 Sheets-Sheet 2.

(NovModeL) UNITE STATES PATENT FFICEQ JOSEPH vD. MORLEY, OF LAKEPLEASANT, NEW YORK.

FOCUSlNG-CAM ERA.

SPECIFICATION forming part of Letters Patent No. 657,437, datedSeptember 4, 1900.

Application filed May 16, 1900.

T0 at whom it mayconcern:

Be it known that I, JOSEPH D. MORLEY, a citizen of the United States,and a resident of Lake Pleasant, Hamilton county, New York, haveinvented certain Improvements in F0- cusing-Cameras, of which thefollowing is a specification.

The object of my invention is to provide a closed box-camera with meanswhereby the accurate focusing of the image may be effected without anyexposure to light of the sensitive film or plate Within the camera. Thisobject I attain in the manner hereinafter set forth, reference being hadto the accompanying drawings, in which- Figure l is alongitudinalsectional view of a closed box-camera, illustrating one means ofcarrying my invention into effect; and Fig. 2 is a similar viewillustrating another embodiment of the invention.

The great objection to ordinary closed boxcameras, such as those usingrolls of sensitive film or internal plate-holders, is the lack of anyprovision for accurate focusing of the image, the usual adjusting-lever,with pointer and scale of distances on the outside of thecamera, being but a crude and unsatisfactory makeshift. My invention,therefore, has for its object the provision of a closed box-camera withmeans whereby the focusing of the image can be effected as accurately aswith an ordinary open box-camera having a focusing-glass at the rearend.

In the drawings, 1 represents the outer casing of the camera; 2, thelens; 3, the shutter mechanism, and 4 the longitudinally-adjust ableinternal structure carrying the film rolls and guides, whereby the filmis exposed in contact with the rear portion 5 of said adjustablestructure. This structure may be adj usted in any desired manneras, forinstance, by engagement of a pin 6 thereon with the indicator-lever 7,which is hung to the outer box 1 and plays in a slot or recess 8therein, this being a commonly-used means of adjustment.

One method of carrying out my invention is to mount upon the outer box 1a lens-carrier 9, having a lens of thesame focus as the lens 2 of thecamera, and to connect to the adjustable structure 4 of the camera afocusing-plate carrier 10, whereby the focusing- Serial No. 16,871. (Nomodel.)

plate 10 will be at the same distance from the lens in the carrier 9 asis the exposed portion of the plate or film from the lens 2. Hence anyadjustment of said focusing-plate toward or from the lens of thefocusing device will be attended by a like movement of the exposedportion of the film or plate from or toward the lens of the camera,whereby a correct focusing of the image upon the focusingplate willinsure an equally-correct focusing of the image thrown by the lens 2upon the exposed surface of the sensitive film or plate within thecamera.

The lens-carrier 9 and focusing-plate carrier 10 may be connectedtogether by any suitable form of telescopic connection, that shown inthe drawings being the usual bel lows connection 11, and a simple methodof connecting the focusing-plate carrier 10 to thelongitudinally-adjustable internal structure 4 of the camera is by meansof a stud-bolt 12, secured to said structure 4, passing through alongitudinal slot 13 in the box 1 and connected to the base portion 14of the focusingplate holder 10, which portion 14 covers the slot 13 inall adjustments of the focusing device, and thus prevents any leakage oflight into the interior of the camera through said'slot. The focusingdevice may be provided with a hood 15 to facilitate the examination ofthe image formed upon the focus ing-plate.

When it is not desired to use an external focusing device, I adopt theconstruction shown in Fig. 2, on reference to which it will be observedthat the longitudinally-adjustablestructure 4 of the camera has withinthe same a pivoted mirror 16, so mounted within the said structure 4that when adjusted to the inclined position shown it will reflect theimage from the lens 2 upwardly onto afocusing-plate 17 in the top of thebox 1, the struc ture 4 having an opening 18, through which the imagecan be projected onto said focusing-plate. The mirror 16 is so disposedthat the length of the axial ray from the lens 2 to the mirror andthence to the focusing-plate 1.7 is precisely the same as the length ofthe axial ray from the lens to the exposed portion of the sensitiveplate at the rear end 5 of the structure 4. Hence the focal length ofthe image formed upon the plate 17 will be precisely the same as that ofthe image formed upon the exposed portion of the sensitive plate. WVhenthe focusing has been completed, the mirror 16 is swung up to the top ofthe structure l, so as to close the opening 18 therein and preventleakage of light into the camera through said opening, and in order tomore effectively attain this object the top of the structure at may havea depending flange 20, into which the mirror 16 will snugly fit when ithas been swung upward. To prevent access of light to the portions of thesensitive film exposed at and near the rolls, the structure 4 may haveinternal partitions inclosing these portions, as shown at 21, and toprevent the leakage of light onto the exposed portion of the sensitiveplate when the mirror 16 is adjusted to the inclined position thestructure 4- may have an inwardly-projecting inclined flange 22, againstwhich the mirror abuts when in the inclined position. Except when beingused for focusing purposes the focusing-plate 1'7 will be covered by acap or slide 23.

Having thus described my invention, I

claim and desire to secure by Letters Patent- 1. The combination of abox-camera having a longitudinally-adjustable film or plate carryingstructure, with a focusing device having its adjustable elementconnected directly to and moving with said longitudinallyadjustable filmor plate carrying structure of the camera, substantially as specified.

2. A camera having a focusing-plate visible from the out-side of thecamera, a longitudinally-adjustable film or plate carrying structure,and an adjustable reflector carried by and moving with said structure,and serv

